Clear App Cache: Go to your device settings, find the Boom Beach app, and clear the cache. Do not clear data unless your progress is backed up.

Check the APK/IPA Source: Ensure you are using the specific modified client provided by the server host. You cannot usually point the official App Store version to a private server without root/jailbreak access.

Unlimited Diamonds: Skip the wait times for upgrades and troop training.

Always remember that private servers require a separate app installation. To keep your device safe: Never use your official Supercell ID on a private server.

Update the Host File: For rooted Android users, ensuring your "hosts" file is correctly mapped to the private server IP is the most common fix for "Unable to Connect" errors. The Benefits of a Fixed Private Server